/*

   Copyright 2002  The Apache Software Foundation 

   Licensed under the Apache License, Version 2.0 (the "License");
   you may not use this file except in compliance with the License.
   You may obtain a copy of the License at

       http://www.apache.org/licenses/LICENSE-2.0

   Unless required by applicable law or agreed to in writing, software
   distributed under the License is distributed on an "AS IS" BASIS,
   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   See the License for the specific language governing permissions and
   limitations under the License.

 */
package org.apache.batik.gvt.event;

import java.util.EventListener;

/**
 * The interface for listening to changes on graphics nodes.
 *
 * @author <a href="mailto:deweese@apache.org">Thomas DeWeese</a>
 * @version $Id$
 */
public interface GraphicsNodeChangeListener extends EventListener {

    /**
     * Invoked when a change has started on a graphics node, but before
     * any changes occure in the graphics node it's self.
     * @param gnce the graphics node change event
     */
    void changeStarted(GraphicsNodeChangeEvent gnce);

    /**
     * Invoked when a change on a graphics node has completed
     * @param gnce the graphics node change event
     */
    void changeCompleted(GraphicsNodeChangeEvent gnce);
}
